初中条件状语从句(附答案)

条件状语从句讲解及练习

一、考点归纳

由连接词if或unless引导的状语从句叫做条件状语从句。（注意：在含有条件状语从句的复合句中，如果主句是一般将来时态，从句要用一般现在是“主将从现原则”。通常译作“假如，如果，除非”。引导词：

常用引导词： if , unless

1.if 引导词用法

学习" if " 引导的条件状语从句的用法,现在总结一下:

if 条件句不一般, 几个要点记心间;

条件句,放在前, 逗号要放句中间。

条件句表可能，主句多用将来时；

条件句表事实，主句常用现在时。

if 引导的条件句有：真实条件句和非真实条件句两种:

（1）真实条件句：表示在某种条件下某事很可能发生。Eg:

a)If you ask him, he will help you. 如果你请他帮忙,他会帮你的。

b)If you fail in the exam, you will let him down. 如果你考试不及格,你会让他失望

的。

c)If it rains tomorrow, we won’t go on a picnic. 如果明天下雨，我们就不去野餐。

注意：切记紧跟着if的那句话是从句。

（2）非真实条件句是虚拟语气的一种，表示与事实相反，不可实现的条件或根本不可能存在的条件,也就是一种虚拟的条件或假设,从句多用一般过去时或过去完成时。 Eg:

a)If I were you, I would invite him to the party. 如果我是你,我会邀请他参加聚会。

b)I would have arrived much earlier if I had not been caught in the traffic. 如果没有堵

车,我会到的早一点儿。

c)If I were you, I would go with him. 如果我是你,我会和他一起去的。

2. unless引导词用法

（1）固定搭配： unless = if...not 除非,若不,除非在……的时候。Eg:

a)You will fail to arrive there in time unless you start earlier.

=If you don’t start earlier, you will fail to arrive there in time. 如果你不早点动身,你就

不能及时赶到那儿。

b)Unless it rains, the game will be played.

=If it dosen't rain，the game will be played. 除非下雨,比赛将照常进行。

c)Let's go out for a walk unless you are too tired.

d)= If you are not too tired, let's go out for a walk

经典语句：If it dosen't rain tomorrow,we will go to the zoo. 条件状语从句就是用以表示“在某

种条件下,会…”

二、课堂练习

I 用所给词的适当形式填空

1.If you ________(feel) tired, you _______________ (have) to have a rest.

2. Where _______ he _________(see) the film if he ________________(have) time?

3. If there __________(be) fewer trees, there _______________( be) more pollution.

4. He _____________(dress) more casually if he ________________( not work) on weekends.

5. If Marcia _____________(live) alone, she ___________________( keep) a pet parrot.

6. Lana ________________( buy) a new dress if the old one ____________(be) out of style.

7.The twins ______________(fight) if they_______________(argue).

8. I ____________(have) a bake sale if I _____________(need) money for education.

9. Peter _____________( send) me a beautiful souvenir if he ________________(tour) Spain.

10. If Mr Green ___________(say) I am hard- working, my parents _________( feel) glad.

11.I ____________(go) to the beach if it________________ ( not rain) this week.

12. __________they __________( have) a match if the P.E. teacher _____________(be) busy?

13.He ____(write) a letter to his grandparents if he ____(get) his report card this week.

14. If she ____________(get) up late, she _____________ ( not catch) the early bus.

15. Peter ________(major) in English if he ____(pass) the exams in Peking University.

15.如果他到的晚了会发生什么事情？What _______________ if he _____________ late?

16. 如果努力学习，你就会取得好成绩。

If you__________ _________, you ___________ good _____________.

17. 他如果看电视太久了，他的父母会不高兴。

If he _________ TV too much, his parents __________ __________ unhappy.

18. 如果我们为他组织生日聚会，大家都会来的。

Everyone ________________ if we _____________ a birthday party __________ him.

19. 如果明天不下雨，我会和你一起去公园的。

If it __________ __________ tomorrow, I ______________ go to the park _________ you.

20. 如果她睡过头了，就会旅游迟到的。

She;__________________________ the trip if she ___________________.